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MAX6694TE9A+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
General Description
The MAX6694 precision multichannel temperature sen-
sor monitors its own temperature and the temperatures
of up to four external diode-connected transistors. All
temperature channels have programmable alert thresh-
olds. Channels 1 and 4 also have programmable
overtemperature thresholds. When the measured tem-
perature of a channel exceeds the respective thresh-
old, a status bit is set in one of the status registers. Two
open-drain outputs, OVERT and ALERT, assert corre-
sponding to these bits in the status register.
The 2-wire serial interface supports the standard system
management bus (SMBus™) protocols: write byte, read
byte, send byte, and receive byte for reading the tem-
perature data and programming the alarm thresholds.
The MAX6694 is specified for a -40°C to +125°C oper-
ating temperature range and is available in 16-pin
TSSOP and 5mm x 5mm thin QFN packages.
Applications
Desktop Computers
Notebook Computers
Workstations
Servers
Features
o Four Thermal-Diode Inputs
o Beta Compensation (Channel 1)
o Local Temperature Sensor
o 1.5°C Remote Temperature Accuracy (+60°C to
+100°C)
o Temperature Monitoring Begins at POR for Fail-
Safe System Protection
o ALERT and OVERT Outputs for Interrupts,
Throttling, and Shutdown
o STBY Input for Hardware Standby Mode
o Small, 16-Pin TSSOP and TQFN Packages
o 2-Wire SMBus Interface
MAX6694
5-Channel Precision Temperature Monitor
with Beta Compensation
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
GND
SMBCLK
SMBDATA
DXN2
DXP2
DXN1
DXP1
V
CC
N.C.
STBYDXN4
DXP4
DXN3
DXP3
MAX6694
ALERT
OVERT
100pF
100pF
100pF
100pF
0.1µF
TO SYSTEM
SHUTDOWN
INTERRUPT
TO µP
DATA
CLK
4.7kΩ
EACH
+3.3V
CPU
Typical Application Circuit
19-4097; Rev 0; 4/08
SMBus is a trademark of Intel Corp.
Pin Configurations appear at end of data sheet.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX6694UE9A+ -40°C to +125°C 16 TSSOP
MAX6694TE9A+ -40°C to +125°C 16 TQFN-EP*
+
Denotes a lead-free package.
*
EP = Exposed pad.
Note: Slave address is 1001 101.
MAX6694
5-Channel Precision Temperature Monitor
with Beta Compensation
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
, SMBCLK, SMBDATA, ALERT, OVERT,
STBY to GND ....................................................-0.3V to +6.0V
DXP_ to GND..............................................-0.3V to (V
CC
+ 0.3V)
DXN_ to GND ........................................................-0.3V to +0.8V
SMBDATA, ALERT, OVERT Current....................-1mA to +50mA
DXIV_ Current .....................................................................±1mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN, 5mm x 5mm
(derate 33.3mW/°C above +70°C)............................2666.7mW
16-Pin TSSOP
(derate 11.1mW/°C above +70°C) ............................888.9mW
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1)
16-Pin TQFN...................................................................2°C/W
16-Pin TSSOP...............................................................27°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)
16-Pin TQFN.................................................................30°C/W
16-Pin TSSOP...............................................................90°C/W
ESD Protection (all pins, Human Body Model) ....................±2kV
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, V
STBY
= V
CC
, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
=
+25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
3.0 3.6 V
Software Standby Supply Current I
SS
SMBus static 3 10 µA
Operating Current I
CC
During conversion (Note 3) 500 2000 µA
Channel 1 only 11
Temperature Resolution
Other diode channels 8
Bits
T
A
= T
RJ
= +60°C to +100°C -1.5 +1.5
3 σ Temperature Accuracy
(Remote Channel 1)
V
CC
= 3.3V,
ß = 0.5
T
A
= T
RJ
= 0°C to +125°C -2.375 +2.375
°C
T
A
= T
RJ
= +60°C to +100°C -2 +2
3 σ Temperature Accuracy
(Remote Channels 2–6)
V
CC
= 3.3V
T
A
= T
RJ
= 0°C to +125°C -2.5 +2.5
°C
T
A
= +60°C to +100°C -2 +2
3 σ Temperature Accuracy
(Local)
V
CC
= 3.3V
T
A
= 0°C to +125°C -2.5 +2.5
°C
T
A
= T
RJ
= +60°C to +100°C -3 +3
6 σ Temperature Accuracy
(Remote Channel 1)
V
CC
= 3.3V,
ß = 0.5
T
A
= T
RJ
= 0°C to +125°C -4 +4
°C
T
A
= T
RJ
= +60°C to +100°C -3 +3
6 σ Temperature Accuracy
(Remote Channels 2–6)
V
CC
= 3.3V
T
A
= T
RJ
= 0°C to +125°C -3.5 +3.5
°C
T
A
= +60°C to +100°C -2.5 +2.5
6 σ Temperature Accuracy
(Local)
V
CC
= 3.3V
T
A
= 0°C to +125°C -3 +3
°C
Supply Sensitivity of Temperature
Accuracy
±0.2
o
C/V
Rem ote C hannel 1 C onver si on Ti m et
CONV1
190 250 312 ms
Remote Channels 2, 3, 4
Conversion Time
t
CONV_
95 125 156 ms
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
MAX6694
5-Channel Precision Temperature Monitor
with Beta Compensation
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, V
STBY
= V
CC
, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
=
+25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
High level, channel 1 500
Low level, channel 1 20
High level, channels 2, 3, 4 80 100 120
Remote-Diode Source Current I
RJ
Low level, channels 2, 3, 4 8 10 12
µA
Undervoltage-Lockout Threshold UVLO Falling edge of V
CC
disables ADC 2.30 2.80 2.95 V
Undervoltage-Lockout Hysteresis 90 mV
Power-On-Reset (POR) Threshold V
CC
falling edge 1.2 2.0 2.25 V
POR Threshold Hysteresis 90 mV
ALERT, OVERT
I
SINK
= 1mA 0.3
Output Low Voltage V
OL
I
SINK
= 6mA 0.5
V
Output Leakage Current 1µA
SMBus INTERFACE (SMBCLK, SMBDATA), STBY
Logic Input Low Voltage V
IL
0.8 V
Logic Input High Voltage V
IH
V
CC
= 3.0V 2.2 V
Input Leakage Current -1 +1 µA
Output Low Voltage V
OL
I
SINK
= 6mA 0.3 V
Input Capacitance C
IN
5pF
SMBus-COMPATIBLE TIMING (Figures 3 and 4) (Note 4)
Serial-Clock Frequency f
SMBCLK
(Note 5) 400 kHz
f
SMBCLK
= 100kHz 4.7
Bus Free Time Between STOP
and START Condition
t
BUF
f
SMBCLK
= 400kHz 1.6
µs
f
SMBCLK
= 100kHz 4.7
START Condition Setup Time
f
SMBCLK
= 400kHz 0.6
µs
90% of SMBCLK to 90% of SMBDATA,
f
SMBCLK
= 100kHz
0.6
Repeat START Condition Setup
Time
t
SU:STA
90% of SMBCLK to 90% of SMBDATA,
f
SMBCLK
= 400kHz
0.6
µs
START Condition Hold Time t
HD:STA
10% of SMBDATA to 90% of SMBCLK 0.6 µs
90% of SMBCLK to 90% of SMBDATA,
f
SMBCLK
= 100kHz
4
STOP Condition Setup Time t
SU:STO
90% of SMBCLK to 90% of SMBDATA,
f
SMBCLK
= 400kHz
0.6
µs
10% to 10%, f
SMBCLK
= 100kHz 1.3
Clock Low Period t
LOW
10% to 10%, f
SMBCLK
= 400kHz 1.3
µs
Clock High Period t
HIGH
90% to 90% 0.6 µs
f
SMBCLK
= 100kHz 300
Data Hold Time t
HD:DAT
f
SMBCLK
= 400kHz (Note 6) 900
ns
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MAX6694TE9A+T

Mfr. #:
Buy MAX6694TE9A+T
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors 5Ch Precision Temperature Monito
Lifecycle:
New from this manufacturer.
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